Blended fabric separation equipment

Abstract

The separation equipment for the blended fabric comprises a plurality of devices and pipelines. The cloth decomposing device contains a solvent, so that the blended cloth is decomposed into polyester and cellulose in the solvent. The first pipeline conveys a first mixed solution output by the cloth decomposing device, and the first mixed solution comprises a solvent and cellulose. The cellulose separation device separates a solvent and cellulose. The cellulose recovery device recovers cellulose. The second pipeline is used for conveying a second mixed solution output by the cellulose separation device, and the second mixed solution comprises a solvent and cellulose which is not separated. And the cellulose filtering device is used for separating the solvent and cellulose in the second mixed solution. The third pipeline conveys a third mixed solution separated by the cellulose filtering device into the cellulose separating device, and the third mixed solution at least comprises cellulose. And the solvent recovery device recovers the solvent separated by the cellulose filtering device. The separation equipment for the blended fabric is a normal-temperature one-step separation and recovery system, and can be used for stably separating the blended fabric and recovering the medicament, so that circular economy and environmental protection value are realized.

Description

Technical Field

[0001] The present invention relates to a cloth separation device, and in particular to a blended cloth separation device. Background Art

[0002] With the rise of environmental awareness, textile industry players have begun to work on improving the recyclability of textiles. However, due to the difficulty of separating different materials in a single textile, textile recycling is currently mostly limited to textiles made of all-polyester materials. In addition, even if equipment or methods for separating blended fabrics are developed, it is difficult to have a stable high recovery rate, and the separation process often uses cumbersome multi-pass engineering, and it is impossible to simultaneously separate the materials in the blended textiles and recover the reagents through a single process. In addition, the separation process often uses high temperature and high pressure processes, which not only consumes energy but also prevents carbon emissions from decreasing, causing damage to the environment. Therefore, how to provide a device and method that can stably separate blended fabrics and recover reagents is a topic that textile industry players are actively researching. Summary of the invention

[0003] The present invention provides a blended fabric separation device, which is a room temperature and one-step separation and recovery system (a single circulation system formed by interconnected pipelines and devices), which can achieve circular economy and environmental protection value by stably separating blended fabrics and recovering reagents.

[0004] According to one or more embodiments of the present invention, a blended fabric separation device includes a fabric decomposition device, a first pipeline, a cellulose separation device, a cellulose recovery device, a second pipeline, a cellulose filtering device, a third pipeline and a solvent recovery device. The fabric decomposition device is configured to contain a solvent so that the blended fabric is decomposed into a polyester material and a cellulose material in the solvent. The first pipeline is connected to the fabric decomposition device and configured to convey a first mixed liquid outputted from the fabric decomposition device, wherein the first mixed liquid comprises a solvent and a cellulose material. The cellulose separation device is connected to the first pipeline and configured to separate the solvent and the cellulose material in the first mixed liquid. The cellulose recovery device is connected to the cellulose separation device and configured to recover the cellulose material separated by the cellulose separation device. The second pipeline is connected to the cellulose separation device and configured to convey a second mixed liquid outputted from the cellulose separation device, wherein the second mixed liquid comprises a solvent and unseparated cellulose material. The cellulose filtering device is connected to the second pipeline and configured to separate the solvent and the cellulose material in the second mixed liquid. The third pipeline is connected to the cellulose filtering device and configured to convey a third mixed liquid separated by the cellulose filtering device to the cellulose separation device, wherein the third mixed liquid comprises at least a cellulose material. The solvent recovery device is connected to the cellulose filtering device and is configured to recover the solvent separated by the cellulose filtering device.

[0005] In one or more embodiments of the present invention, the blended fabric separation device further comprises a liquid level controller disposed in the cellulose separation device and configured to control the volume of the first mixed liquid in the cellulose separation device.

[0006] In one or more embodiments of the present invention, the blended fabric separation device further comprises a pH detector disposed in the solvent recovery device and configured to detect the pH value of the solvent in the solvent recovery device.

[0007] In one or more embodiments of the present invention, the blended fabric separation device further includes a pressure detector or a flow detector. The pressure detector is disposed on the third pipeline and is configured to detect the pressure of the third mixed liquid in the third pipeline. The flow detector is disposed on the third pipeline and is configured to detect the flow of the third mixed liquid in the third pipeline.

[0008] In one or more embodiments of the present invention, the blended fabric separation device further comprises a backwashing device connected to the cellulose filtering device, wherein the backwashing device comprises an air pump.

[0009] In one or more embodiments of the present invention, the blended fabric separation device further comprises a fourth pipeline. The fourth pipeline connects the solvent recovery device and the fabric decomposition device and is configured to transport the solvent in the solvent recovery device to the fabric decomposition device.

[0010] In one or more embodiments of the present invention, the cellulose filtering device is a filter element, and the filter element has at least one filter hole, the filter hole extends from the inner wall of the filter element to the outer wall of the filter element, the filter hole has a first pore size close to the inner wall, the filter hole has a second pore size close to the outer wall, and the first pore size is smaller than the second pore size.

[0011] In one or more embodiments of the present invention, the first pore size is 5 micrometers (μm) to 15 μm, and the second pore size is 0.05 μm to 0.15 μm.

[0012] In one or more embodiments of the present invention, the filter element has a central channel, the second mixed liquid flows through the central channel for separation, and the flow direction of the second mixed liquid in the central channel is parallel to the inner wall of the filter element.

[0013] In one or more embodiments of the present invention, the cloth decomposing device is a cloth circulating device.

[0014] According to the above-mentioned embodiment of the present invention, the blended fabric separation device can simultaneously separate the blended fabric and recover the cellulose material and the agent used to separate the blended fabric, and has a stable recovery rate, thereby ensuring that the agent can be reused and realizing the circular economic value. In addition, the blended fabric separation device is a one-step separation and recovery system, and can separate the blended fabric at room temperature, realizing the environmental protection value of low energy consumption and low carbon emission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows:

[0016] Figure 1A A schematic diagram of a portion of a blended fabric separation device according to some embodiments of the present invention;

[0017] Figure 1B A schematic diagram of other parts of a blended fabric separation device according to some embodiments of the present invention;

[0018] Figure 2A is a structural schematic diagram of the cellulose filtering device and a partial perspective view thereof when the cellulose filtering device is a filter element;

[0019] Figure 2B for Figure 2A A partial enlargement of the partial perspective view; and

[0020] Figure 3 The present invention is a control flow chart of a blended fabric separation device according to some embodiments of the present invention.

[0021]

Explanation of symbols

[0022] 100: Blended fabric separation equipment

[0023] 110: Cloth decomposition device

[0024] 120: Cellulose separation device

[0025] 122: Stirrer

[0026] 124: Liquid level controller

[0027] 126: Filter

[0028] 130: Cellulose recovery device

[0029] 140: Cellulose filtration device

[0030] 150:Solvent recovery device

[0031] 152: pH value tester

[0032] 160: Backwash device

[0033] 170,190: Pressure tester

[0034] 180: Flow meter

[0035] P1: First pipeline

[0036] P2: Second pipeline

[0037] P3: The third pipeline

[0038] P4: The fourth pipeline

[0039] F: Blended fabric

[0040] S:Solvent

[0041] B: Power Components

[0042] R: conveying element

[0043] H: Filter hole

[0044] CH: Central Channel

[0045] L1: Long axis direction

[0046] S1: Inner wall

[0047] S2: Outer wall

[0048] D1: Flow direction

[0049] D2: Filter direction

[0050] X1: First aperture

[0051] X2: Second aperture

[0052] A1, A2: Flow direction DETAILED DESCRIPTION

[0053] The following will disclose multiple embodiments of the present invention with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary and therefore should not be used to limit the present invention. In addition, in order to simplify the drawings, some commonly used structures and components will be illustrated in a simple schematic manner in the drawings. In addition, for the convenience of readers, the sizes of the components in the drawings are not drawn according to the actual scale.

[0054] It should be understood that although the terms "first", "second", and "third" etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, the "first element", "component", "region", "layer" or "part" described below may also be referred to as the second element, component, region, layer or part without departing from the teachings of this article.

[0055] The present invention provides a blended fabric separation device, which can recover cellulose materials and agents used to separate (decompose) blended fabrics while separating blended fabrics, and has a stable recovery rate, thereby ensuring that the agents can be reused and realizing the value of circular economy. In addition, the blended fabric separation device is a one-step separation and recovery system, and can separate blended fabrics at room temperature (e.g., 40 degrees Celsius), realizing the environmental protection value of low energy consumption and low carbon emission.

[0056] Please also see Figure 1A and Figure 1B , Figure 1A and Figure 1B The mixed fabric separation device 100 is formed together, wherein Figure 1A is a schematic diagram of a portion of a blended fabric separation device 100 according to some embodiments of the present invention, and Figure 1B Schematic diagram of other parts of the blended fabric separation device 100 according to some embodiments of the present invention. In detail, Figure 1A is a schematic diagram of a cloth decomposition device 110 in a blended cloth separation device 100, and Figure 1B Schematic diagram of other devices in the blended fabric separation device 100. The blended fabric separation device 100 of the present invention includes a fabric decomposition device 110, a first pipeline P1, a cellulose separation device 120, a cellulose recovery device 130, a second pipeline P2, a cellulose filtering device 140, a third pipeline P3 and a solvent recovery device 150. The configuration and details of the above devices and pipelines will be described in order below.

[0057] See also Figure 1A. The blended fabric separation device 100 includes a fabric decomposition device 110, which is configured to contain a solvent S (agent) so that the blended fabric F is separated (decomposed) into a polyester material and a cellulose material in the solvent S. In other words, the fabric decomposition device 110 of the present invention can be used to separate a blended fabric F containing a polyester material and a cellulose material. In some embodiments, the blended fabric F may include polyethylene terephthalate and cotton. In other embodiments, the blended fabric F may include polyethylene terephthalate and rayon. The blended fabric separation device 100 of the present invention can achieve a good separation effect for the blended fabric F containing the above components. In some embodiments, the solvent S may include 2,2,6,6-tetramethylpiperidinyl oxide (abbreviated as TEMPO), sodium bromide (NaBr) and sodium hypochlorite (NaClO) (abbreviated as TEMPO / NaBr / NaClO solvent system). Since the TEMPO / NaBr / NaClO solvent system can quickly oxidize hydroxyl groups into carboxyl groups and cause little damage to cellulose and hemicellulose materials during oxidation, the cellulose materials in the blended fabric F can be efficiently oxidized into nanocellulose with high utilization value, and the nanocellulose can be recovered by operating the blended fabric separation device 100. On the other hand, the use of the TEMPO / NaBr / NaClO solvent system can also help the recycled polyester material maintain high structural integrity, that is, the recycled polyester material can have the form of a complete fabric.

[0058] In some embodiments, the cloth decomposition device 110 may be a cloth circulation device, such as a dyeing machine (e.g. Figure 1A As shown). In other embodiments, the cloth decomposition device 110 can be any textile machine with a cloth circulation device, such as a dyeing machine, a washing machine, etc. Since the cloth decomposition device 110 can be a cloth circulation device or a textile machine with a cloth circulation device, the blended cloth separation device 100 of the present invention can directly combine the conventional textile device therein, thus eliminating the tedious process of refitting and connecting the device, thereby improving the practical application of the blended cloth separation device 100. Figure 1A As shown, the blended fabric F can be repeatedly circulated and transported in the fabric decomposition device 110 and immersed in the solvent S through the operation of a conveying element R such as a roller, and the solvent S can be repeatedly circulated and flowed in the fabric decomposition device 110 through the operation of a power element B such as a pump or a motor. This dynamic immersion method helps to improve the separation efficiency of the blended fabric F. In some embodiments, the conveying element R is disposed in the fabric decomposition device 110, and the power element B is connected to the fabric decomposition device 110. On the other hand, by separating the blended fabric F in a state of repeated circulated transport, it can be ensured that the blended fabric F is not excessively stirred and turned, which helps to maintain high structural integrity of the recycled polyester material.

[0059] During the operation of the blended fabric separation device 100, the blended fabric F and the solvent S are placed in the fabric decomposition device 110, so that the blended fabric F is decomposed into a polyester material and a cellulose material in the solvent S, wherein the solvent S and the cellulose material are mixed to form a first mixed liquid. After the blended fabric F is separated, the obtained polyester material can be recycled into a polyester recovery device (not shown), and the separated cellulose material can be dispersed in the solvent S to form a first mixed liquid. In some embodiments, the blended fabric F and the solvent S can react with each other at a temperature below 45 degrees Celsius, preferably 38 degrees Celsius to 42 degrees Celsius, to achieve a better reaction effect. In some embodiments, the fabric decomposition time can be 180 minutes to 360 minutes to avoid residual cellulose material in the recycled polyester.

[0060] See also Figure 1B The blended fabric separation device 100 includes a cellulose separation device 120, and the cellulose separation device 120 is connected to the fabric decomposition device 110 (see Figure 1A to Figure 1B , so as to facilitate understanding of the connection between the cellulose separation device 120 and the cloth decomposition device 110), and is configured to receive the first mixed liquid and separate the solvent S and the cellulose material in the first mixed liquid. Specifically, during the operation of the blended fabric separation device 100, the first mixed liquid can be transported from the cloth decomposition device 110 to the cellulose separation device 120 to separate the solvent S and the cellulose material in the first mixed liquid, wherein the solvent S obtained after separation can leave the cellulose separation device 120 through the pipeline, and the cellulose material obtained after separation can be precipitated on the filter screen 126 by gravity to be further transported to the cellulose recovery device 130 (to be described later). In some embodiments, the blended fabric separation device 100 may further include a stirrer 122, which is disposed in the cellulose separation device 120, so that the first mixed liquid can be separated into the solvent S and the cellulose material by stirring. In some embodiments, the rotation speed (stirring speed) of the stirrer 122 may be, for example, 10 rpm to 30 rpm to achieve a better separation effect.

[0061] In some embodiments, the blended fabric separation device 100 may further include a liquid level controller 124, which is disposed in the cellulose separation device 120 and configured to control the volume of the first mixed liquid in the cellulose separation device 120. In detail, the liquid level controller 124 may detect the volume of the first mixed liquid in the cellulose separation device 120 to ensure that there is a sufficient amount of the first mixed liquid in the cellulose separation device 120 at any time, thereby promoting the separation process to maintain the separation efficiency. Specifically, when the liquid level controller 124 detects that the volume of the first mixed liquid is less than 20% to 30% of the volume of the cellulose separation device 120, a control device (not shown) connected to the liquid level controller 124 and the fabric decomposition device 110 may control the increase of the flow rate of the first mixed liquid transported from the fabric decomposition device 110 to the cellulose separation device 120 through a component such as a motor (the motor is connected to the fabric decomposition device 110) to replenish the first mixed liquid to the cellulose separation device 120 in real time; when the liquid level controller 124 detects that the volume of the first mixed liquid is less than 20% to 30% of the volume of the cellulose separation device 120, a control device (not shown) connected to the liquid level controller 124 and the fabric decomposition device 110 may control the increase of the flow rate of the first mixed liquid transported from the fabric decomposition device 110 to the cellulose separation device 120 through a component such as a motor (the motor is connected to the fabric decomposition device 110) to replenish the first mixed liquid to the cellulose separation device 120 in real time; When the meter 124 detects that the volume of the first mixed liquid is greater than 30% to 40% of the volume of the cellulose separation device 120, the control device (not shown) connected to the liquid level control meter 124 and the cloth decomposition device 110 can also control the flow rate of the first mixed liquid delivered from the cloth decomposition device 110 to the cellulose separation device 120 through a component such as a motor (for example, the motor is not operated to maintain the flow rate), thereby avoiding excessive accumulation of the first mixed liquid in the cellulose separation device 120, resulting in poor separation effect. It should be understood that since the separation state (for example, separation efficiency) of the first mixed liquid may vary with the different dispersion conditions of the components in the first mixture input each time, the design of the liquid level control meter 124 can ensure that the separation state of the first mixed liquid is not affected by the dispersion conditions of the components in the first mixture.

[0062] It should be noted that the cellulose separation device 120 can separate most (e.g., more than 80%) of the cellulose material from the first mixture, while the cellulose material that is not separated from the first mixture leaves the cellulose separation device 120 along with the solvent S through the pipeline, wherein the solvent S and the cellulose material dispersed in the solvent S and not separated are collectively referred to as the second mixed liquid. In other words, the second mixed liquid of the present invention includes the solvent S and the cellulose material that is not separated.

[0063] Please continue reading Figure 1BThe blended fabric separation device 100 includes a cellulose recovery device 130, which is connected to the cellulose separation device 120 and configured to recover the cellulose material separated by the cellulose separation device 120. Specifically, during the operation of the blended fabric separation device 100, the cellulose material separated by the cellulose separation device 120 can be collected into the cellulose recovery device 130. In some embodiments, the cellulose recovery device 130 is disposed below the cellulose separation device 120 to facilitate receiving the cellulose material settled due to gravity.

[0064] Please continue reading Figure 1B The blended fabric separation device 100 includes a cellulose filtering device 140, which is connected to the cellulose recovery device 130 and is configured to separate the solvent S and the cellulose material in the second mixed liquid. Specifically, during the operation of the blended fabric separation device 100, the second mixed liquid separated by the cellulose separation device 120 can be transported to the cellulose filtering device 140, so that the cellulose filtering device 140 separates the solvent S and the cellulose material in the second mixed liquid.

[0065] In some embodiments, the cellulose filter device 140 may be a filter element. Figure 2A , which is a structural schematic diagram and a partial perspective view of the cellulose filter device 140 when the cellulose filter device 140 is a filter element. Figure 2A As shown, the cellulose filtering device 140 may have a central channel CH and a plurality of filtering holes H, wherein the central channel CH penetrates the filter element along the long axis direction L1 of the filter element, and the filtering holes H extend from the inner side wall S1 of the filter element to the outer side wall S2 of the filter element. When the second mixed liquid flows through the central channel CH, it contacts the filtering holes H to filter the cellulose material (in Figure 2A In more detail, since the size of the cellulose material is larger than the molecular size of the solvent S, when the solvent S flows through the filter hole H, it can pass through the filter hole H and flow out on the side of the filter hole H close to the outer wall S2 of the filter element, while the cellulose material is blocked on the side of the filter hole H close to the inner wall S1 of the filter element and remains in the central channel CH, that is, the cellulose material and the solvent S are separated due to the difference in particle size.

[0066] In some embodiments, the filtering effect of the cellulose filter device 140 on the second mixed liquid can be improved by designing the flow direction of the second mixed liquid. Specifically, the flow direction D1 of the second mixed liquid in the central channel CH of the cellulose filter device 140 can be designed to be parallel to the extension direction of the inner wall S1 of the cellulose filter device 140 (filter element), so that the filtering direction D2 of the second mixed liquid (i.e., the flow direction of the second mixed liquid in the filter hole H) can be perpendicular to the flow direction D1 of the second mixed liquid. In other words, the second mixed liquid can be filtered out when it flows along the tangent direction of the inner wall S1. Through this tangential cross-flow filtration method, the fluidity of the second mixed liquid (filtrate) can be maintained to achieve the purpose of dynamic filtration. Compared with the conventional static filtration method (i.e., the flow direction of the filtrate is parallel to the flow direction of the filtrate in the filter hole), the dynamic filtration method can avoid the clogging of the filter hole H, which helps to improve the filtering effect. In some embodiments, to ensure that the second mixed solution is filtered by tangential cross-flow filtration, the flow rate of the second mixed solution when passing through the cellulose filtration device 140 can be controlled by pressure. In some embodiments, the pressure of the second mixed solution when passing through the cellulose filtration device 140 is 2.5 kg / cm2 (kg / cm 2 ) to 5kg / cm 2 In some embodiments, the pressure of the second mixed liquid when passing through the cellulose filtering device 140 may be monitored by a pressure detector 190 disposed between the cellulose separation device 120 and the cellulose filtering device 140 .

[0067] In some embodiments, the filtering effect of the cellulose filtering device 140 on the second mixed liquid can be improved by designing a special shape of the filtering hole H. Figure 2B , which is Figure 2A A partial enlarged view of the partial perspective view in the figure. Figure 2BAs shown, the filter hole H has a first pore size X1 at the inner side wall S1 close to the cellulose filter device 140 (filter element), and the filter hole H has a second pore size X2 at the outer side wall S2 close to the cellulose filter device 140 (filter element), and the first pore size X1 can be smaller than the second pore size X2. Through this design, the cellulose material with a larger particle size is easily blocked in the filter element, while at the same time, the solvent S with a smaller particle size is easily filtered out through the filter element, thereby achieving unidirectional flowability to enhance the filtering and separation effect. In a preferred embodiment, the first pore size X1 can be 5 microns (μm) to 15 microns, and the second pore size X2 can be 0.05 microns to 0.15 microns, so as to match the particle size difference between the cellulose material and the solvent S, increase the probability of the cellulose material being blocked in the filter element, and increase the probability of the solvent S passing through the filter element, thereby achieving a better filtering effect. In a more preferred embodiment, the pore size of the filter hole H may be gradually reduced (decreased) from the inner wall S1 of the cellulose filter device 140 (filter element) to the outer wall S2 of the cellulose filter device 140 (filter element), thereby achieving a better filtering effect.

[0068] Please continue reading Figure 1B . It should be noted that the cellulose filtering device 140 can separate most (for example, more than 90%) of the cellulose material from the second mixed liquor, and the cellulose material that is not separated from the second mixture leaves the cellulose filtering device 140 along with the solvent S through the pipeline, wherein the solvent S and the cellulose material dispersed in the solvent S and not separated are collectively referred to as the third mixed liquor. In other words, the third mixed liquor of the present invention includes the solvent S and the cellulose material that is not separated. After completing the filtration step, the solvent S separated by the cellulose filtering device 140 can be collected separately from the cellulose material. Specifically, the solvent S separated by the cellulose filtering device 140 can be collected into the solvent recovery device 150 (to be described later), and the third mixed liquor separated by the cellulose filtering device 140 can be transported back to the cellulose separation device 120 for re-separation.

[0069] Please continue reading Figure 1BThe blended fabric separation device 100 includes a solvent recovery device 150, which is connected to the cellulose filtering device 140 and is configured to recover the solvent S separated by the cellulose filtering device 140. In some embodiments, the blended fabric separation device 100 may further include a pH detector 152, which is disposed in the solvent recovery device 150 and is configured to detect the pH value (pH value) of the solvent S in the solvent recovery device 150. In detail, the pH value of the recovered solvent S must be maintained within a specific range to be reusable. If the pH value of the solvent S deviates from the range, the cellulose material cannot be effectively separated and cannot be reused, and there is no need to return to the fabric decomposition device 110. Specifically, the pH value of the solvent S must be greater than 9.9. In some embodiments, when the pH value detector 152 detects that the pH value of the solvent S in the solvent recovery device 150 is less than 9.9, the control device (not shown) connected to the pH value detector 152 can control the replenishing device (not shown) to make the replenishing device add the pH value adjuster to the solvent recovery device 150 to ensure that the recovered solvent S has a reuse value; and when the pH value detector 152 detects that the pH value of the solvent S in the solvent recovery device 150 is greater than 9.9, the control device connected to the pH value detector 152 can control the replenishing device not to operate, and control the solvent S in the solvent recovery device 150 to be directly transported back to the cloth decomposition device 110. In a preferred embodiment, the pH value of the recovered solvent S can be 9.9 to 10.1, so as to more efficiently separate the cellulose material.

[0070] Please continue reading Figure 1B . In some embodiments, the blended fabric separation device 100 may further include a backwashing device 160, which is connected to the cellulose filter device 140 and configured to ensure the stability of the overall circulation flow of the blended fabric separation device 100. Specifically, the backwashing device 160 includes an air pump. When the pressure of the third mixed liquid output by the cellulose filter device 140 is too high or the flow rate is too low (for example, the cellulose filter device 140 may be blocked, resulting in too much cellulose material in the third mixed liquid output by the cellulose filter device 140, causing the pressure of the third mixed liquid to be too high or the flow rate to be too low), the backwashing device 160 can be started to pass air into the cellulose filter device 140 at a certain pressure through the air pump therein, thereby unblocking the filter hole H in the cellulose filter device 140 to restore the flowability of the filter hole H, so that the blended fabric separation device 100 as a whole has a stable circulation flow.

[0071] In some embodiments, the blended fabric separation device 100 may further include a pressure detector 170, which is configured to detect the pressure of the third mixed liquid in the pipeline when the third mixed liquid is output from the cellulose filtering device 140 to the pipeline, so as to determine whether to start the backwash device 160. In some embodiments, when the pressure of the third mixed liquid in the pipeline is greater than or equal to 5 kg / cm 2 , the backwashing device 160 can be started. In other embodiments, the blended fabric separation device 100 may further include a flow meter 180, which is configured to detect the flow rate of the third mixed liquid in the pipeline when the third mixed liquid is output from the cellulose filter device 140 to the pipeline, so as to determine whether to start the backwashing device 160. In some embodiments, when the flow rate of the third mixed liquid in the pipeline is less than or equal to 2 ml / s, the backwashing device 160 can be started. In a preferred embodiment, the pressure detector 170 and the flow detector 180 can be configured to simplify the blended fabric separation device 100. In a more preferred embodiment, whether to start the backwashing device 160 is determined by detecting the pressure of the third mixed liquid in the pipeline (i.e., the value presented by the pressure detector 170), so as to make a more accurate judgment. In some embodiments, in order to achieve a better dredging effect, air can be introduced into the cellulose filter device 140 at a pressure of 7.4 bar to 7.6 bar (e.g., 7.5 bar). In other embodiments, in order to achieve a better dredging effect, the angle between the air introduction direction and the outer side wall S2 of the cellulose filter device 140 (filter element) may be 90 degrees.

[0072] Please continue reading Figure 1BThe blended fabric separation device 100 includes a plurality of pipelines to connect the plurality of devices in the blended fabric separation device 100 (i.e., the fabric decomposition device 110, the cellulose separation device 120, the cellulose recovery device 130, the cellulose filtering device 140, and the solvent recovery device 150). More specifically, the blended fabric separation device 100 includes a first pipeline P1, a second pipeline P2, a third pipeline P3, and a fourth pipeline P4. The first pipeline P1 connects the fabric decomposition device 110 and the cellulose separation device 120, and is configured to transport the first mixed liquid output from the fabric decomposition device 110 to the cellulose separation device 120. The second pipeline P2 connects the cellulose separation device 120 and the cellulose filtering device 140, and is configured to transport the second mixed liquid output from the cellulose separation device 120 to the cellulose filtering device 140. The third pipeline P3 is also connected to the cellulose filtering device 140 and the cellulose separating device 120, and is configured to transport the third mixed liquid separated by the cellulose filtering device 140 to the cellulose separating device 120, that is, the flow directions of the liquid in the second pipeline P2 and the third pipeline P3 are opposite. In some embodiments, the pressure detector 170 and the flow detector 180 can be arranged on the third pipeline P3 to perform their functions, that is, the pressure detector 170 and the flow detector 180 can perform their functions by detecting the flow of the third mixed liquid in the third pipeline P3. The fourth pipeline P4 is connected to the solvent recovery device 150 and the cloth decomposition device 110, and is configured to transport the solvent S in the solvent recovery device 150 back to the cloth decomposition device 110.

[0073] Please read next Figure 3 , which is a control flow chart of the blended fabric separation device 100 according to some embodiments of the present invention. The control flow chart of the blended fabric separation device 100 can integrate the operations of the above-mentioned devices, including the liquid level control of the cellulose separation device 120, the backwash control of the cellulose filtering device 140, and the acid-base control of the solvent recovery device 150.

[0074] In the following description, multiple embodiments will be listed to conduct various tests and evaluations to verify the efficacy of the present invention. It should be understood that the present invention should not be interpreted restrictively by the following embodiments.

[0075] [Experimental Example 1: Recovery rate test of polyester and solvent]

[0076] In this experimental example, Figure 2A to Figure 2BThe blended fabric separation device and method shown in the figure are used to separate the blended fabrics of Examples 1 to 5. The blended fabrics of Examples 1 to 5 are composed of polyethylene terephthalate (70 parts by weight) and cotton (30 parts by weight). In the step of decomposing the fabric, the TEMPO / NaBr / NaClO solvent system is used to decompose the fabric at the temperature in Table 1, and the decomposition time is 180 minutes to 360 minutes. In the step of separating cellulose, the speed of the stirrer is 30 rpm. In the step of filtering cellulose, the cellulose is filtered by using a sieve as shown in FIG. Figure 2A The filter element shown is used as a cellulose filter device, wherein the first pore sizes of the filter element are 5 microns to 15 microns, and the second pore sizes are 0.05 microns to 0.15 microns, and the pressure of the second mixed liquid passing through the cellulose filter device is 2.5 kg / cm 2 Table 1 specifically lists the temperature, polyester recovery rate and solvent recovery rate in the cloth decomposition step of Examples 1 to 5.

[0077] Table 1

[0078]

[0079] From the results in Table 1, it can be seen that the blended fabric separation device and method of the present invention can decompose the blended fabric at a temperature below 42 degrees Celsius, and can obtain a polyester material with a recovery rate of more than 92.9% and a solvent (agent) with a recovery rate of more than 80.5%. In addition, no suspended particles were detected in the solvent, indicating that no cellulose material remained in the solvent, so the solvent can be directly recycled and reused in the device.

[0080] [Experimental Example 2: Spinning test of recycled polyester]

[0081] In this experimental example, the recycled polyesters of Examples 1 to 5 were mixed with conventional polyesters obtained through non-recycling at specific ratios (see Table 2), and spun at a spinning speed of 2400 m / min to form fibers of specific specifications. The specifications, strength and elongation of the spun fibers are shown in Table 2.

[0082] Table 2

[0083]

[0084] From the results in Table 2, it can be seen that after the recycled polyester of the present invention is blended with conventional polyester, long fibers with standard fiber strength and elongation can be obtained by long fiber spinning. Compared with many conventional recycled polyester materials that cannot have high crystallinity, the recycled polyester of the present invention has high crystallinity and can be spun into long fibers.

[0085] In summary, the blended fabric separation device of the present invention can not only separate the polyester material from the cellulose material in the blended fabric, but also can be used to separate the medicine of the blended fabric, and has a stable recovery rate, thereby ensuring that the medicine can be reused and realizing the value of circular economy. In addition, the recycled polyester material can be spun into long fibers with high crystallinity. In addition, the blended fabric separation device is a one-step separation and recovery system, and can separate the blended fabric at room temperature (for example, about 40 degrees Celsius), realizing the environmental protection value of low energy consumption and low carbon emission.

[0086] Although the present invention has been disclosed as above in the form of implementation modes, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the definition of the attached claims.

Claims

1. A blended fabric separation device, characterized in that: include: a cloth decomposition device configured to contain a solvent, so that a blended cloth is decomposed into a polyester material and a cellulose material in the solvent; a first pipeline connected to the fabric decomposition device and configured to transport a first mixed liquid outputted from the fabric decomposition device, wherein the first mixed liquid includes the solvent and the cellulose material; a cellulose separation device connected to the first pipeline and configured to separate the solvent and the cellulose material in the first mixed liquid; a cellulose recovery device connected to the cellulose separation device and configured to recover the cellulose material separated by the cellulose separation device; a second pipeline connected to the cellulose separation device and configured to transport a second mixed liquid outputted from the cellulose separation device, wherein the second mixed liquid includes the solvent and the unseparated cellulose material; a cellulose filtering device connected to the second pipeline and configured to separate the solvent and the cellulose material in the second mixed liquid; a third pipeline connected to the cellulose filtering device and configured to transport a third mixed liquid separated by the cellulose filtering device to the cellulose separating device, wherein the third mixed liquid at least includes the cellulose material; and A solvent recovery device is connected to the cellulose filtering device and is configured to recover the solvent separated by the cellulose filtering device.

2. The blended fabric separation device according to claim 1, characterized in that: Also includes: A liquid level controller is disposed in the cellulose separation device and is configured to control the volume of the first mixed liquid in the cellulose separation device.

3. The blended fabric separation device according to claim 1, characterized in that: Also includes: A pH value detector is disposed in the solvent recovery device and is configured to detect the pH value of the solvent in the solvent recovery device.

4. The blended fabric separation device according to claim 1, characterized in that: Also includes: a pressure detector, disposed on the third pipeline and configured to detect the pressure of the third mixed liquid in the third pipeline; or A flow detector is disposed on the third pipeline and configured to detect the flow of the third mixed liquid in the third pipeline.

5. The blended fabric separation device according to claim 1, characterized in that: Also includes: A backwash device is connected to the cellulose filtering device, wherein the backwash device includes an air pump.

6. The blended fabric separation device according to claim 1, characterized in that: Also includes: A fourth pipeline connects the solvent recovery device and the cloth decomposition device and is configured to transport the solvent in the solvent recovery device to the cloth decomposition device.

7. The blended fabric separation device according to claim 1, characterized in that: The cellulose filtering device is a filter element, and the filter element has at least one filter hole, which extends from an inner wall of the filter element to an outer wall of the filter element, and has a first pore size near the inner wall, and a second pore size near the outer wall, and the first pore size is smaller than the second pore size.

8. The blended fabric separation device according to claim 7, characterized in that: The first pore size is 5 micrometers to 15 micrometers, and the second pore size is 0.05 micrometers to 0.15 micrometers.

9. The blended fabric separation device according to claim 7, characterized in that: The filter element has a central channel through which the second mixed liquid flows for separation, and the flow direction of the second mixed liquid in the central channel is parallel to the inner side wall of the filter element.

10. The blended fabric separation device according to claim 1, characterized in that: The cloth decomposing device is a cloth circulating device.

Images